Cows can sleep standing up, but they can only dream lying down.
745
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
In the last 7 years, humanity has discovered 43 potentially habitable planets.
14
If aliens located 60-65 million light years away from us, looked at earth through a really powerful telescope today, they would see dinosaurs!
18
The average person in their lifetime will spend an estimated 20,160 minutes kissing!
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